What does MAIN stand for?

Main Command Post for Referenced Echelon - Military technology (DDF)

Main command post for that echelon (SAUS)

Maine Shortline - Federal Railroad Administration identification code

Main St. & Main - NASDAQ symbol

Main St. & Main, Inc. - NASDAQ symbol (SAG)

Maintenance (NASA)

Mark Line Industries - NCIC trailer make code

Material Automated Information System

Material Automated Inventory Network (MCD)

Medical Automation Intelligence - System

Mid-America Interconnected Network - Regional power council

Mid-America Interpool Network (SAUO)

Midwest Alliance in Nursing (SRA)

Military Authorization Identification Number

Multiple Access Internal Network - Computer science